Thanks to the wonderful photos and info provided by Todd and others, I've had a chance to make some progress on the 3D model. Right now I'm roughing in general components, starting with the front suspension. It always had a frame, and I've modified it after seeing the photos to be more realistic. The V12 engine, transmission and drivetrain are just placeholders right now to give me a general location. I'll detail them later. I've put in the radiator frame mount, spindle, front axle and a leaf spring. Once I get the geometry worked out I'll detail it all. The Packard pictures Todd provided show a straight cross member close to the front spring shackles. I'm going to put diagonal braces in there instead.